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当前位置: 首页 > 文章 > 米老排锯材干燥中试研究 西北林学院学报 2012,27 (6) 168-173
Position: Home > Articles > Pilot-scale Experiment on the Drying of the Sawn Timber of Mytilaria laosensis Journal of Northwest Forestry University 2012,27 (6) 168-173

米老排锯材干燥中试研究

作  者：
刁海林;唐继新;唐贤明;郑华庭;白灵海;罗建举
单  位：
中国林业科学研究院热带林业实验中心;广西大学林学院
关键词：
米老排;锯材;干燥基准;中试
摘  要：
进行米老排(Mytilaria laosensis)锯材干燥中试,验证中试干燥基准的正确性,以求获得适于米老排生产应用的干燥基准。采用生产中广泛使用的强制气流循环普通干燥窑,在给定的中试干燥基准下对米老排锯材实施中级干燥试验,并按照国家标准(GB/T 6491-1999)进行锯材干燥质量评定。试验结果表明:米老排锯材干燥产品的平均终含水率7.5%;厚度含水率偏差为0.91%;应力指标4.06%;平均顺弯度为0.36%,横弯度为0.14%;扭曲度为0.29%;瓦弯度为2.54%;纵裂度为4.79%;截面收缩率为0.19%;无内裂。干燥至含水率12%时所用时间为224h(9.33d);干燥速度为0.36%·h-1。锯材总体干燥质量等级为二级,达到木制品生产对米老排锯材干燥质量的要求。
译  名：
Pilot-scale Experiment on the Drying of the Sawn Timber of Mytilaria laosensis
作  者：
DIAO Hai-lin1,TANG Ji-xin2,TANG Xian-ming1,ZHENG Hua-ting1,BAI Ling-hai2,LUO Jian-ju1(1.College of Forestry,Guangxi University,Nanning,Guangxi 530004,China;2.Experimental Center of Tropical Forestry,CAF,Pingxiang,Guangxi 532600,China)
关键词：
Mytilaria laosensis;sawn timber;drying benchmark;pilot-scal test
摘  要：
A pilot-scale test on the drying of the sawn timber of Mytilaria laosensis was carried out to examine the accuracy of the Chinese drying schedule.A widely applied drying kiln with a forced air circulation system was adopted to implement intermediate level drying with a given test drying schedule.The quality of the dried sawn timber was evaluated according to national standard(GB/T 6491-1999).The related parameters of the dried M.laosensis sawn timber were as follows: average final moisture content: 7.5%;thickness moisture deviation: 0.91%;stress index: 4.06%;average longitudinal bending degree: 0.36%;lateral bending degree: 0.14%;distortion degree: 0.29%;tile shape bending degree: 2.54%;longitudinal cracking degree: 4.79%;cross section shrinkage rate: 0.19%.No internal crack was observed.The time of drying to a water content of 12% was 224 h(9.33 d);drying speed was 0.36%·h-1.The overall drying quality of sawn timber achieved grade two,indicating that the quality of M.laosensis sawn timber after drying could meet the production requirements.

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